it depends on the type of ride your looking for. Eibach spings give you a slightly stiffer ride from stock. H&R and progress springs give you a stiffer ride than Eibach because they were made for occasional track use, but is still good enough for steet. Progress springs give you a 1.3 inch drop front and rear. H&R gives you a 1.3 in the front and 1.2 in the back. Im not to sure about Eibach though but its most likly around 1.2 as well. In my opinion I would go with H&R springs,because they've been around longer, but really it doesnt matter because progress springs are good too.